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| Number | Title | Issue Date |
| 5805337 | Light gathering apparatus A light gathering apparatus for gathering luminous fluxes incident from two different directions, including a luminous flux gathering optical element which includes an array of continuous first and second emission surfaces alternately and symmetrically ar... | 09/08/1998 |
| 4981352 | Projection display device A projection display device having a dichroic prism having at least two incident surfaces and an emergence surface, separate color image emitting elements being disposed in opposing relation to the two incidence surfaces, respectively, of the dichoric pri... | 01/01/1991 |
| 4844599 | Compact and high-speed wide-angle zoom lens system A wide angle zoom lens system having a high level of brightness includes a zooming subsystem comprising first and second movable lens units and a fixed third lens unit. The first lens unit has at least one aspherical lens surface. In the preferred embodim... | 07/04/1989 |
| 4720179 | Zoom lens system for use with a compact camera Two lens groups the distance between which is changed during zooming. The first lens group closest to the object has a positive focal length and comprises, from the object side, a negative length first lens unit of positive and negative elements, a second... | 01/19/1988 |
| 4720825 | Optical data reproducing devices having improved trick play capability An optical data reproducing device including an illuminating system for respectively, simultaneously illuminating at least two separate tracks of an optical disk with at least two light beams; a photo-electric conversion device for respectively converting... | 01/19/1988 |
| 4553170 | Electronic camera An electronic camera capable of both still picture photographing and motion picture photographing in which one operation can be switched over to the other with ease and in which a bright image of the object is provided in the viewfinder with little attenu... | 11/12/1985 |
| 4544848 | Photo-electric conversion device with accumulation time control and leakage current compensation A photo-electric conversion device is provided with a light receiving array and circuits serving to scan the same. A light receiving device separate from the array and connected in parallel therewith is used as a part of a control device for controlling t... | 10/01/1985 |
| 4518243 | Shutter speed setting device for camera A shutter speed setting device for a camera having a signal generator for providing an output in correspondence to the setting of a shutter speed to be set and a shutter speed setting circuit for providing a signal corresponding with a shutter speed in re... | 05/21/1985 |
| 4384776 | Charge detection display type electronic flash A charge detection display type electronic flash in which the fact that the main capacitor is charged is detected and the flash is prevented from operating until the main storage capacitor is fully charged and in which triggering of the flash tube is prev... | 05/24/1983 |
| 4223988 | Camera having a focusing device A single lens reflex camera including an objective having an optical axis for focusing an image of an object and a device for determining when the objective has properly focused an image at an image plane which is located at a position which is optically ... | 09/23/1980 |
| 4196988 | Manual or automatic camera and electronic flash for use therewith A camera has an electrical exposure-time determining structure as well as a manually adjustable electrical structure and a light-responsive electrical structure both of which are connected to the exposure-time determining structure by way of a selecting c... | 04/08/1980 |
| 4171155 | Method and apparatus for focusing a photographic apparatus The photographic apparatus has an objective and device for determining when the objective has focused an image in a predetermined plane. This device has an optical system having along its optical axis an image plane normal to the optical axis in which a g... | 10/16/1979 |
| 4132036 | Adjusting structure in an aspheric lens grinding apparatus A lens grinding apparatus which is particularly suitable for grinding aspheric lenses has a rotary shaft which carries the lens which is to be ground and which is supported for rotation about the axis of the shaft by a support structure which has a suppor... | 01/02/1979 |
| 4114169 | Camera with data-recording structure A camera which has the capability of photographically recording data. A film guide which guides film for movement in a film plane defines an exposure aperture through which an area of the film is exposed by way of the objective, diaphragm, and shutter of ... | 09/12/1978 |
| 4110765 | Light-measuring systems for single lens reflex cameras A single lens reflex camera has behind its objective a main mirror for reflecting light up to the viewfinder. This main mirror has a semitransparent portion through which part of the light which has traveled through the objective passes. Behind the semitr... | 08/29/1978 |
| 4099195 | Camera having automatic and manual exposure-time determination A camera which is capable of automatically determining exposure time and which is also capable of providing for manual determination of exposure time either in a manual-mechanical range of exposure times or in a mechanical-electrical range of exposure tim... | 07/04/1978 |
| 4068246 | Mirror and associated structure for single lens reflex cameras A single lens relfex camera is provided with a mirror which has a viewing position, where the mirror is inclined downwardly across an optical axis of a camera objective for directing an image of an object which is to be photographed upwardly to a viewfind... | 01/10/1978 |
| 4059835 | Bypass circuits for improving the response of electric shutters An electric shutter circuit employs a photodiode which forms the collector load of a logarithmic amplifier. The photodiode is shunted with an active device which is caused to conduct during shutter operation to supply an additional current to the logarith... | 11/22/1977 |
| 4058816 | Camera exposure control system having digitally controlled timing circuitry including a decimal count storing memory This invention provides apparatus for producing a command signal used to control the closing of a camera shutter. Before the shutter opens, a photo-responsive portion of the apparatus generates a number of serially occurring data pulses. After the shutter... | 11/15/1977 |
| 4042942 | Camera with motor drive A camera which has the capability of having film transported and the shutter cocked by way of a motor drive. The camera has a combined film-transporting and shutter-cocking structure capable of being displaced from a given starting position to an end posi... | 08/16/1977 |
| 4041506 | Timing circuits for camera shutters A memory capacitor in an electric shutter circuit has one terminal coupled to a voltage responsive element such as a diode, which operates to effectively reduce the level to which the capacitor is charged to thereby attain a decrease in discharge time of ... | 08/09/1977 |
| 4035814 | Electronic flash apparatus controlled by a digital memory system An electronic flash apparatus to be used for photographing purposes and controlled by a digital memory system. A flash structure provides flash illumination while an oscillator circuit produces pulses the frequency of which is determined according to a fa... | 07/12/1977 |
| 4034385 | Camera with a single automatically or manually operable memory switch A camera which has only a single memory switch capable of being either automatically or manually operated. This single memory switch is connected between a memory capacitor and a light-responsive structure for storing in the memory capacitor at least part... | 07/05/1977 |
| 4032932 | Automatic shutter controls for cameras A camera is provided with a photo-responsive pulse generator for generating pulses the number of which is determined by the logarithmically converted light intensity at an object which is to be photographed. A reference pulse generator is also provided fo... | 06/28/1977 |
| 4016576 | Exposure value display for cameras A system for displaying an exposure value in the viewfinder of a camera or exposure meter. At least part of the light which travels through the objective of the camera is used for determining an exposure value which is displayed in a luminous manner at a ... | 04/05/1977 |
| 4007466 | Electrical system having a photoelectric converter to be used in photography An electrical system to be used for photographic purposes. The electrical system has an input circuit for providing a given input signal as well as an output circuit for utilizing the latter signal and an intermediate circuit electrically connected betwee... | 02/08/1977 |
| 4006484 | Camera systems for providing precise exposures with digital light measurement A camera having a digitally operating structure for determining exposure time according to a digital value corresponding to the light intensity. The camera also has an adjustable diaphragm. The latter is adjusted in accordance with the difference between ... | 02/01/1977 |
| 3994595 | Systems for statically determining brightness characteristics of an area to be photographed A system for detecting the brightness of an area which is to be photographed. A plurality of series circuits respectively include a plurality of photosensitive devices for respectively receiving light from different parts of the area while remaining subst... | 11/30/1976 |
| 3992714 | Photographic film exposure determining system compensated for temperature and voltage fluctuations An electrical system wherein exposure time and diaphragm aperture form a pair of exposure-determining factors one of which is automatically determined by the system in connection with exposure of film in a camera. The electrical system forms an exposure m... | 11/16/1976 |
| 3990086 | Shutter control circuit for cameras A shutter control circuit for a camera including a timing circuit for measuring the exposure time during which the shutter will remain open. The shutter control circuit further includes a switching circuit having a switching transistor with a collector, c... | 11/02/1976 |
| 3979079 | Roll film winding mechanism A roll film winding mechanism is provided for film of the type which is wound on a flanged winding spool with superposed liner paper for protection against light intrusion and accidental exposure. The winding mechanism includes a tension roller disposed b... | 09/07/1976 |
| 3973268 | Camera with automatic film advance A camera which is capable of being operated, at the option of the operator, either continuously to make a series of exposures in an automatic manner or in a single-exposure manner according to which the operator may make a single-exposure. In the continuo... | 08/03/1976 |
| 3969735 | Camera with automatic exposure-determining structure A camera which has the capability of automatically determining exposure of film. A light-responsive structure of the camera produces a number of pulses which is inversely proportional to light brightness while a reference pulse generating structure is cap... | 07/13/1976 |
| 3966304 | Liquid crystal display device A liquid crystal display device, useful for selectively displaying numbers or other symbols in accordance with an electrical control potential applied across two electrode surfaces in the device, is constructed in such a way as to eliminate the need for e... | 06/29/1976 |
| 3956757 | Camera exposure control circuit An automatic exposure control circuit for a camera including a light receiving element positioned internally of the camera for receiving light passing through the camera objective. The light receiving element converts the incident light into a correspondi... | 05/11/1976 |
| 3945732 | Light-measuring systems A light-responsive system which includes a plurality of photosensitive elements respectively directed to different parts of a scene for respectively providing electrical inputs according to the brightness of the light at the different parts of the scene. ... | 03/23/1976 |
